Machine for making rings



J. F. CRAWFORD.

MACHINE FOR MAKING RINGS. APPLICATION FILED FEB.20, 1919.

Patented Sept. 13, 1921.

5 SHEETS SHEET J. F. CRAWFORD.

MACHINE FOR MAKING RINGS.

. APPLICATION FILED FEB. 20, 1919.

Patented Sept. 13, 1921.

5 SHEETS-SHEET 2- 1. F. CRAWFORD.

MMMMM NEFOR MAKING RINGS.

1 APPLICATION FILED FEB. 20, 1919. 1,390,507, PatentedSept. 13, 1921.

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MACHINE FOR MAKING RINGS.

APPLICATION FILED FEB 20 19 9' 1 1,390,507, PatentedSept. 13, 1921.

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J. F. CRAWFORD. MACHINE FOR MAKING RINGS. APPLICATION man ms. 20, 1919. 1,390,507. PatentedSept. 13 1921. E

SHE TS-SHEET 5 ig-i NirEn stars Paren JoI-m F. CRAWFORD, QF'RACINE, wr'soonsrmnssrenon TQ. J I. ohsnfr1-ritnsnr1 ie MACHINE COMPANY, or, RACINE, WISCONSIN, A CORPORATION or Wiscons n.

MACHINE roe Mums BINGS- Specification of Letter-sPatent semi- 13; 1.921,

Application filed February 20, 1919. Serial No. 278,269.

To all whom it may concern:

Be itknown that I, JOHN F. CRAWFORD,

.a citizen of the United-States, residing at Racine, in the county of Racine and State of WVisconsin, have invented certain new, and useful Improvements in Machines for Making Rings, of which the following is a specislab or bar and by various successive steps developing the same into perfect ring formation, which is readily-accomplished, and

, whereby I am enabled to produce heavy 7 ring blank for milling into gear wheels or other machine partsin a very simple manner, and consequently at a mater al saving in time and expense.

In the accompanying drawings, which are made a part hereof, I have illustrated a press as a convenient means for producing the ring, but as will be understood, other appropriate means may be employed to produce similar-results in the various stages of I formation of such ring. In the drawmgs, Figure 1 is a side elevation of a hydraulic press showing upper and lower dies in place and the the cylinders which form a part of such structure Fig. 2 is a plan on the, dotted line 2-2 of'Fig. 1; Fig. 3 a section through the upper and lower dies showing the same in position for wedging; Fig. at is a plan-of the lower die showin'g the stock or iron bar to be formed into a] ring after having been wedged, said {view being taken on the dotted line 4-41 in Fig. '3; Fig. 5 a bottom. plan of the upper die taken on the dotted line 5-1-5 in 3; Fig. 6 a view showing the block on which the stock is placed after being wedged and ,removed fromthe-diaas indicated in Fig. 4, said figure also 7 including fragments of the upper andrlower die parts; Fig. 7 shows the stock when spreadjapart by the upward pressure of the lower die against the upper "die; Fig. 8 2. section taken on the dotted line 88, in Fig. 7 Fig. 9 illustrates the nextv operation of rounding theends of the stock to a smallradius by the action of the lower die against thevupper die Fig. 10

the si'icceedingoperation after the stockhas been placed on a former .of greater radius by which the action of the meeting dies .mally positioned approximately at'the floor when the machine is, in operation.

give a. portion of the ring a greater-curve'; Fig. 11 shows the dies in conta'ctduring the last," step of forming said ring;F-ig. 12 is a fragmentary sectional view of thedie parts.

The press comprises in general a well known construction embodying "columns, 5, upon which is mounted ahead,6,' which maybe adjusted upon said columnsby suitable collars, 7, indicated in F ig. 1. A table, 8, is also, mounted upon said columns 5, norline of a building, which is adjustedupwardlyand downwardly along said columns 5 by means of pressure: controlled plunge'rs, 9,10, which are actuated by compressedfluid' conveyed'from a suitable source (not shown) through pipes, 11, 12.

Upon table 8 I mount a die, 13, which is secured thereto by clamps, as 14, and within said die is a. plunger, 15, adapted .to reciprocate therethrough by a plunger. 1 6,"which receives its fluid pressure through pipe, 17, saidpipe 17 being sectioned and connected by ball joints, as at 18, to permit table 8 to travel upon columns 5.. in" said dieji13 I providefa hardened ring, 19,, jand in said plunger a socket, 20," for tlier eception of a.

wedge, for purposes to hereinafter. appear. Upon the outer wall of die 13 I place a'plur ality of formers-23, 24, Figs. 9,710, which cooperate with die, 26, mounted inthe head 6, for performingoperations to be described.

In head 61 the 'die26 is secured by clamps, 27 bolted thereto,"or otherwise, and is provided with a plurality offorming members, 28, 29, having curvedcontact faces" as 30', 31, to.approximat e1y'conform to the, contour of the formers 23,24, carried by die 13, and is provided upon its inner pe-' ripheral face with a' guide, 33, of hardenedv material toreceive ,the ascending die '13 I also provide in 'said' die a wedge, 34, which is bolted or otherwise secured thereto as indi cated in Fig. 3. i I f 'j While I have specifically described my improved machine for. forming ringsjjf rom stockorbar material, it willbe understood that otherrexpediencies be employed.

for producing the same results, and-I have,

chine as a means for accomplishing my pur-' pose, and in employing the same I am enabled to readily form rings of the character hereinbefore referred to in an expeditious manner and at greatly reduced cost, for it will be understood that the utilization of such rings for gear wheels in high power farm Vehicles and other structures must be of considerable weight, those contemplated herein ranging in weight from one hundred and ninety to two hundred and forty pounds, and consequently, when produced in a manner connnonly'practised, involve v considerable expense in manufacture, which expense, as stated, I materially minimize by carrying out the following operations.

I I take an ordinary bar of commerce, 36, of suitable length and thickness, and round the ends thereof inthe manner indicated in Fig. 13, and drill a hole, 37 therethrough (Fig. 14) for the insertion of a suitable in strumentality for sawing a kerf, 38, longitudinally through'the same (Fig. 15), such as the oxyacetylene torch orotherwise. ,I then operate. the plunger 15 to bring the face thereof flush with the upper surface of die 13 so as to form a smooth surface for the reception of said bar 36, which has been previously heated to the required degree, and which I then place thereon. Table 8, carrying die 13, is then operated to ascend by means of fluid pressure through pipes 11, 12, the plunger 15 also traveling therewith by pressure through pipe 17, so that said die and plunger carry bar 36 intocontact with wedge 34, which enters the slot or kerf 38 of bar 36, and, as said die and plunger continue ascending,-said wedge is forced through said bar and spreads'the sides thereof apart as indicated in Figs. 4, 6, and 16.

Upon the outside of die 13 I place a form: ing block, 40, either fixedly secured thereto or resting upon table 8, and after said bar 36 has been wedged in the maner indicated and as shown in said Fig. 6, the same is placed in standing position upon said block 40, ,in the meantime table 8 and the parts carried thereby having been withdrawn from proximity to die 26.] At this stage in the processv table 8 and die 13 are caused to ascend so that the upper end of bar 36 is brought against one of theqforming members, as, 28, andas table 8 travels upwardly to its limit of movement the pressure be tween block 40. and forming member 28 causes said bar to be further divided, so that its members 41, 42, undergo a further spreading effect as indicated in Figs. 7 and 17. When this operation has been accomplished the widened material is transferred to a former 23 (F ig- 9 and is caused to ascend against forming member 28, which operation results in the formation of the bar into the shapeindic'ated in Figs. 18 and 19, respectively, it being understood, of course,

and shape the same. V

2. A press comprising ahead, a'table movthat the same has been turned from end to end by attendants so that both ends will undergo the same operation. The material is then transferred to a former 24 having a curvature of wider radiusi(Fig. 10), and the pressing'or dieing operations repeated in the manner heretofore described, with the result that it is caused to assume the shape indicated in Figs. 10 and 20, but when turned from end 'to end and undergoing pressure the form becomes that, shown in *ig. 21. The material after these operations being stillheated to a high degree, isof sufficient pliability to be further straightened or formed, and I then place the same in a final shaping instrumentality, such for. in-

stance as die 13 and plunger15, by whichit is brought into contact with die 26 and under pressure is shaped into true circular form, 45, as indicated in Fig. 22. As a con-. venient means for handling the complete ring when said die andplunger have been withdrawn from die 26 I may, by the fluid pressure indicated, advance said plunger 15' to the position indicated inFig. 3, by which movement said ring 45 is forced upwardly to lie freely upon the surface provided by said plunger and die 13, from whence it may be removed in any suitable manner.

In this simple manner, as will bereadily understood, I am enabled to produce'a heavy ring from bar material by employing difi'ervent formative steps to spread and shape the same by variable pressure operations, with the result of a perfect ring as indicated in Fig. 22, which production is ecomically attained and by which I am enabled to obtain from commercial bar material stock rings mounted upon said table, a forming block on said die, a die carried by said head comprising a forming member registering with said forming block, and means for actuating said table and its die to bring material in contact with said forming member topress able in the direction of said head, adie 'mounted upon said table, a forming block in said die, a die carried by said head comserviceable for gearwheels and other purprising a forming member registering with said forming block, means for actuating said table and its die to bring material in contact with said forming member to press and shape the same, and a plunger in said table die for cooperating therewith in the formationand removal of material.

3. A press comprising ahead, a'table movable in the direction of said head, a die mount d up n said table, a plunger in said die and having a socket therein, means for actuating said plunger to position the upper surface thereof in the horizontal plane of said die, an upper die having a wedge therein, and means for actuating said table die to contact with said upper die and to permit the projection of said wedge into said socket.

4. In a press, a. stationary die, a forming member thereon, a movable die adapted to contact with said stationary die, a wedge in said stationary die, and means for projecting said movable die toward said stationary dieto cause said wedge to spread material carried by said movable die.

5. In a press, a movable table, a die carried thereby, a bearing block associated with said die, a stationary die above said table and means for actuating-said table toward said stationary die to press and form material therebetween and said bearing block.

6. In a press, a stationary die, a, guide comprising hardened material within said die, a wedge carried by said die, a movable die beneath said stationary die and having a plunger therein, means for actuating said movable die to contact with said stationary die and to be positioned within the guide therein, and means for actuating said plunger to register with the surface of said movable 30 V die for supporting material to be operated upon by said wedge.

In testimony whereof I afiix my signature.

JOHN F. CRAWFORD. 

